package com.fuint.common.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;

/**
 * 安全中心配置
 *
 * Created by FSQ
 * CopyRight https://www.fuint.cn
 */
@Configuration
@EnableWebSecurity
@EnableMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfig {

    /**
     * 解决 无法直接注入 AuthenticationManager
     *
     * @return
     * @throws Exception
     */
    @Bean
    public AuthenticationManager authenticationManager(AuthenticationConfiguration authConfig) throws Exception {
        return authConfig.getAuthenticationManager();
    }

    /**
     * anyRequest          |   匹配所有请求路径
     * access              |   SpringEl表达式结果为true时可以访问
     * anonymous           |   匿名可以访问
     * denyAll             |   用户不能访问
     * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
     * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
     * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
     * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
     * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
     * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
     * permitAll           |   用户可以任意访问
     * rememberMe          |   允许通过remember-me登录的用户访问
     * authenticated       |   用户登录后可访问
     */
    @Bean
    public SecurityFilterChain filterChain(HttpSecurity httpSecurity) throws Exception {
        httpSecurity
                // CSRF禁用，因为不使用session
                .csrf(csrf -> csrf.disable())
                // 基于token，所以不需要session
                .sessionManagement(session -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                // 过滤请求
                .authorizeHttpRequests(authz -> authz
                        // 允许匿名访问
                        .requestMatchers(
                                "/clientApi/**",
                                "/backendApi/**",
                                "/merchantApi/**"
                        ).anonymous()
                        .requestMatchers(
                                HttpMethod.GET,
                                "/",
                                "/static/**",
                                "/*.html",
                                "/**/*.html",
                                "/**/*.css",
                                "/**/*.js",
                                "/profile/**"
                        ).permitAll()
                        .requestMatchers("/swagger-ui.html").anonymous()
                        .requestMatchers("/swagger-resources/**").anonymous()
                        .requestMatchers("/webjars/**").anonymous()
                        .requestMatchers("/*/api-docs").anonymous()
                        .requestMatchers("/druid/**").anonymous()
                        // 除上面外的所有请求全部需要鉴权认证
                        .anyRequest().authenticated()
                )
                .headers(headers -> headers.frameOptions().disable());
        
        return httpSecurity.build();
    }

    /**
     * 强散列哈希加密实现
     */
    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }
}
